In the early ‘70s, KTLA had George Putnam’s “Talk back to the news” and the American Nazi Party would be on it ever so often. I don’t know if they were “strong” in that area but certainly, there’s a Dragnet on the Nazi Party in Southern California during that era. It may be the Chess Champ Bobby Fischer got connected to them as well back then.
Addendum: And when they were on KTLA, certainly enough, they wore those uniforms. That was audience participation, not actually up on stage.